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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

FeatureJohn Deere 644K High LiftWheel loaderJohn Deere 644K HybridWheel loader
TypeWheel LoaderWheel Loader
Horsepower173.0 kW—
Weight18506.6 kg18343.3 kg
Tipping Capacity12228.8 kg—
Max Speed36.7 km/h—
Engine Model6068 HPowerTech PSX 6068
No Of Cylinders6—
AspirationTurbocharged charge air cooled—
Displacement6784.3 cc6800.6 cc
Alternator Supplied Amperage80 amps—
Operating Voltage24 V—
Rated Speed1700 RPM—
Torque Speed1400 RPM—
Net Power173.0 kW—
Peak Torque1015.5 N-m—
Torque Rise55 %19 %
Fuel Capacity352.0 l397.1 l
Engine Oil Capacity24.6 l—
Cooling Capacity29.5 l—
Hydraulic System Capacity110.2 l—
Transmission Oil Capacity23.1 l38.2 l
Differential Front Capacity22.3 l22.3 l
Differential Rear Capacity22.3 l22.3 l
Transmission TypePower shiftPower shift
No of Forward Gears4—
No of Reverse Gears3—
Rear Axle Oscillation26 °—
Max Speed (Forward)36.7 km/h—
Max Speed (Reverse)24.9 km/h—
Pump typeVariable axial piston—
Pump Flow310.0 LPM—
Relief Pressure251.7 bar—
Raise Lift Arms5.5 sec—
Lower Lift Time3 sec—
Bucket Dump Time1.4 sec—
Operating Weight18506.6 kg18343.3 kg
Tipping Load12228.8 kg—
Bucket Capacity (Heaped)3.3 m³—
Bucket Capacity (Struck)2.8 m³—
Bucket Width304.8 cm—
Breakout Force13780.1 kg—
Reach At Max Lift And Dump121.9 cm152.4 cm
Dump Clearance At Max Raise335.3 cm—
Turning Radius548.6 cm—
Wheelbase335.3 cm335.3 cm
Bucket Hinge Pin457.2 cm426.7 cm
Cab Height335.3 cm—
Overall Length853.4 cm823.0 cm
Ground Clearance30.5 cm46.1 cm
Width Over Tires274.3 cm274.3 cm
Tire Size23.5 R25—
Alternator—100 amps
Hydraulic Tank—106.4 l
Sourceheavyequipments.net archive (imported 2026-10)heavyequipments.net archive (imported 2026-10)
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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051